a-a a-t aaa aaf aar aas aat aay af- afa aff afr afs aft afy ar- ara arf arr ars art ary as- asa asf asr ass ast asy at- ata atf atr ats att ay- aya ayf ayr ays ayt faa faf far fas fat fay ffa fff ffr ffs fft ffy fra frf frr frs frt fry fsa fsf fsr fss fst fta ftf ftr fts ftt fty fy- fya ra- raa raf rar ras rat ray rfa rff rfr rfs rft rra rrf rrr rrs rrt rsa rsf rsr rss rst rta rtf rtr rts rtt rty ry- rya ryf ryr rys ryy saa saf sar sas sat say sfa sff sfr sfs sft sr- sra srf srr srs srt sry ss- ssa ssf ssr sss sst sta stf str sts stt sty sy- sya syr sys syt taa taf tar tas tat tay tfa tff tfr tfs tft tra trf trr trs trt try tsa tsf tsr tss tst tsy tta ttf ttr tts ttt tty tya tyf tyr tys tyt yaa yaf yar yas yat yay yfa yff yfr yfs yft yra yrf yrs yrt ysa ysr yss yst ysy yta ytf ytr yts ytt yyf yys yyt yyy